Leather-staking machine.



G. W. BAKER. l LEATHER STAKING MACHINE'.

APPLICATION FILED JULY 30, 1903. l NO MODEL. 4 SHEETS--BHEET 1.

PATENTBD DEC. 6, 1904.

Illllllllllll "2:" --WM @vih/manu PATENTED DEC. 6, 1904. G. W. BAKER.

LEATHER STAKING MACHINE.

APPLICATION FILED JULY 30. 1903.

4 SHEETS-SHEET 2,

N0 MODEL.

witnesses PATENTED DEJJ, 1904.

G. W'. BAKER.

LEATHER STAKING MACHINE.

APPLICATION .FILED JULY 30. 1903.

4 SHEETE-SHEET 3.

No. 776,984. PATENTBD DBC. e, 1904-. G. W. BAKER.

LEATHER STAKING MACHINE.

APPLIoATIoN FILED JULY ao, 190s.

no MODEL. 4 snEnTs-snnn'r 4.

rvrrn Patented December 6, 1904.

GEORGE W. BAKER, OE WILMllNGTON, DELAWARE.

LEATHER-STAKING MACHINE.

SPECIFICATION forming part of Letters Patent No. 776,984, dated December 6, 1904. Application filed July 30, 1903. Serial No. 167,613. (No model.)

T0 LZZ whom, it may concern:

Beitknown that LGEORGIG WV. BAKER, aciti- Zen of the United States, and a resident et' Wilmington, in the county el Newcastle and State ot' Delaware, have made a certain new and useful lnvention in Leather-Staking Machines; and 1 declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it appertains to make and usc the -invention, reference being' had t0 the accompanying' drawings, and to letters and figures et'l reference marked thereon, which form a part of this specilication.

Figure 1 is a perspective view. Fig. 2 is a longitudinal vertical sectional view. 3 is a vertical transverse sectional view. Eig. 4 is a plan view. Fig'. 5 is a side view oit' the slide-head. Fig. 6 is a transverse section of the same. Figs. 7, 8, 9, 10, and 11 are views of details. Fig. 12 is a detail view showing f, to which is pivoted the connection-bar y,

which is connected to the slide-head 71:, reciprocating' on bearings Z of the frame. Forward oi' the pivot connection 2 to the slidehead the connection-bar has an oblique extension t, which is provided witha wrist-pin and roller 3, engaging the slot-cam m at the lower portion of the lever fr, which is provided with a fulcrum at 4: in connection with the slidehead. To the upper arm of this lever is pivoted a connecting-bar which is pivoted to the adjacent ends of the toggle-lever sections 6, the outer ends of which are pivoted to the shorter power-arms oi the operating jaw-levers 7 7, whereof the upper one carries the staking-roller 8 and slicker or fiber bearing 9 and the under one the staking-blade, these levers in relation to the work.

being arranged at the ends of the long arms ot these jaw-levers. The lower jaw 7 and the lever fr are pivoted upon the same rod 41, such lever/r being' thus located forward of the toggle-sections. The pivot-rod connection 6L oi the adjacent ends of the toggle-lever sections is guided. in supporting-ways 10 of the slidehead, so that the jaw-levers move in unison in their operation,and the toggle-levers are firmly supported in their work. The reciprocating motion ot the slide-head and jaw-levers is ei'- fected by the crank-arm and its connection-bar, while the opening and closing oi the jaw-levers is etl'ected by the slot-cam ot' the pivoted arm fr of the slide-head. The lower part of the cam-slot fm, is circularly curved on a center coinciding with the pivot connecting the connection-bar to the slide-head, and the upper portion of the cam-slot has a tangential relation to the curved lower portion at a slight angle, as at 12, but sutlicientto cause the opening and closing of the operating-arms of the jaw- When, however, the wrist-pin of the extension oi' the connection-bar is engaged in the curved lower portion of the cam-slot, the jaw-levers have their operating ends closed on the work, this closure continuing until the wristpin becomes engaged with the tangential portion oi the cam-slot. Springs 13, in connection with the jaw-levers and the slide-head, serve to counterbalance the weight ot the long arms of said jaw-levers and to provide Afor theiriacile Inovenient, the opening' and closing ol the jaw-levers being', however, effected .in a positive and even manner by the cam and toggle mechanism.

The staking knife or blade 14 is secured to the upright flange 15 ot' the plate 16, which is adjustably attached by` bolts 171L to Vlower slide-plate 17. Upon loosening' these bolts these plates may be adjusted by movement of said bolts in the slots 17h. The rear stakingblade 1A is secured to upright flange 15, having an adjustable bolt connection at 15" with the plate 16. The plates 16 and 17 have movement of reciprocation in slideway 16 by rotation of cam-head 19, having' a bearing or seat 18 in the lower slide-plate. The stein 181 oi' this cam-head 19 is provided witha tappet 20, extending late 'ally and designed to be en- IOO gaged by arms 30 to rotate the cam-head 19 and move the staking-blades forward or backward to a slight extent to increase or decrease the pressure of the staking-blades upon the staking-roller. The stops BO are fast upon a longitudinally-adjustable slide-rod 21, having bearings in the frame at 21a and carrying a slide 28 at its rear end portion, such rod being operated by the treadle 23, pivoted to rod 23, having an upright arm 26 fast thereto,`

rod 27 connecting the upper end of arm 26 with slide 21h. In this way upon depression of the treadle the arm 26 is moved forwardly upon its pivot, the rod 21 and its stops 30 being also moved forwardly. These arms 30 are arranged upon rod 21 just beyond stroke-distance, so that the tappet 2O in the position assumed when the staking-blades are in normal position will in the course of the stroke ordinarily not contact therewith. Upon depression of the treadle, however, the arms 30 are moved forwardly, as aforesaid, whereupon the tappet as it moves rearwardly in the course of the stroke will strike the rear arm 30 and be turned thereby and the stakingblades adjusted by the action of cam 19. In order to fix this adjustment of the treadle and of the arms 30, the pawl-lever 24, pivoted at 24 to the treadle, is engaged with the stationary ratchet-arm 25, connected to rod 23a and bolted to the frame at 25. Upon the release of the pawl-lever 24 from ratchet-arm 25 the spring 29, connecting arm 26 with the frame, will return said parts to their normal positions, when the tappet 2O in its movement will strike the forward arm 30 and be turned backwardly to return the staking-blades to their normal positions. If an increase of pressure is desired and the staking-blades are to be adjusted to a greater extent, the treadle is depressed to a greater extent and its adjustment fixed by engagement of the pawl-lever 24 with the lower teeth of the ratchet-arm 25. The adjustment of the staking-blade is, it will be observed, in the direction of the radius of the roller and horizontal, so that it is direct pressure applied at the level of contact without shifting the edge of the staking-blade in a tangential manner. There is therefore no liability to injure the leather when the adjustment for increase of pressure is made during the working of the staking roller and blade, and as there is no change of level of the line of contact with the leather, which is always operated between the edge of the staking-blade and the same level on the rollerface at about the horizontal axial plane of the roller, the work is true and easily governed by the operator, who is not required to allow for change of position of the knife-edge with reference to the roller, whereby said edge would be thrown out of the proper working position above mentioned, this position 'providing for a suitable bend of the leather over the edge of the blade. If more pressure of the staking-blade is required, the pawl is caused to engage the ratchet one tooth lower down. An adjustment of two teeth lower down gives more pressure, and so on, while all pressure may be taken on instantly at the will of the operator through the treadle device, so that his hands are free at all times to handle the leather.

The staking knife or blade 14 is upright or vertical, its working edge being on a level with the axis of the staking-roller. In this way pressure of the knife upon the roller will not dig into or cut the leather being operated upon, inasmuch as there is no direct pressure of the knife-edge upon the roller, the pressure being exerted by the substantially parallel inner knife-face near its edge and the adjacent roller-face, the action of the knifeedge being of a scraping character and in no sense a digging or cutting action.

It will be noted that the cam device for adjusting the staking-blade is of self-holding character.

Having described the invention, what I claim, and desire to secure by Letters Patent, 1s

1. In a leather-working machine, the combination of a slide-head,upper and lower leverjaws pivoted to said head and carrying respectively a staking-roller and a stakingblade, toggle-sections connecting said jaws and head, a connecting pivot-rod for said togglesections, guideways and supports of said slidehead for said rod, a cam-slotted lever pivoted upon the pivot-rod of said lower jaw forward of said toggle-sections and having a connection therewith, a driving-shaft, and the connecting-rod for said shaft and head having an extension engaging said slotted lever, substantially as specified.

2. In a leather-working machine, the combination with a vibratory lever-jaw, of a horizontally-adjustable holding-plate carrying a staking-blade, and means for adjusting said blade, comprising a cam engaging said plate and having a tappet-arm, a treadle, and means in connection with the treadle for operating said arm and cam, substantially as specified.

IOO

IIO

3. In a leather-working machine, the com- A bination with a vibratory lever-jaw, of a horizontally-adjustable holding-plate carrying a staking-blade, a cam engaging said plate, and having a tappet arm, a reciprocatory rod having stop projections for engagement with said tappet-arm, and means for operating said rod, substantially as specified.

4. In a leather-working machine, the combination of a driving-shaft, a slide-head, a connecting-bar for said shaft and head having an angular extension, opposite lever-j aws, togglesections connecting said slide-head and jaws, the cam-slotted lever engaged by said angular extension, and having a connection with said toggle-sections, one of said jaws carrying the staking-roller and the opposite jaw carrying IIS IZO

a horizontally adjustable holding-plate, a staking-blade carried by said holding-plate, a cam for adjusting' said plate, a treadle, and means in connection therewith for operating said cam, substantially as specilied.

5. The combination with a leather-staking machine, of a horizontally-adjustable stakingblade, self-holding means for adjusting' said blade, and treadle-operated means for actuating said self-holding means, substantially as specified.

6. The combination with a leather-staking machine, of a horizontally-adjustable stakingblade, and a self-holding cam device for adjusting said blade, substantially as specified.

7. The combination With a leather-staking machine, of a horizontal]y-adjustable stakingblade, a self-holding cam device for adjusting' said blade, and treadle-operated means for actuating' said cam device, substantially as specified.

8. In a leather-staking machine, the combination of a horizontally-adjustable stakingblade, a cam device for adjusting said blade, treadle-operated means for actuating said cam device, and means for fixing the adjustment thereof, substantially as speciiied.

9. A leather-staking machine having in combination a horizontally-adjustable stakingblade, a cam device for adjusting' said blade and having a tappet-arrn, a reciprocatory rod having projections for engagement with said arm, treadle-operated means for adj nsting said rod, and means for fixing such adjustment comprising a pawl-lever pivoted to the treadle, and a stationary ratchet engaged by said pawl-lver, substantially as specilied.

l0. In a leather-staking machine, the combination of a horizontally-adjustable stakingblade, self-holding means for adjusting said blade, treadle-operated means for actuating' said self-holding means, and means for iixing the adjustment ot' the treadle comprising a pawl-lever pivoted to the treadle, and a stationary ratchet engaged by said pawl-lever, substantially as speeilied.

l1. In a leather-staking machine, the combination of a staking-roller, a horizontallyadjustable vertical staking-blade having its upper working edge on a level with the axis of said roller, self-holding means for adjusting said blade, and treadle-operated means for actuating1 said self-holding means, substantially as speciiied.

In testimony whereof I attix my signature in presence of two witnesses.

GEORG-E W. BAKER. Witnesses:

HERBERT C. EMERY, JENNIn M. WRIGHT. 

